Here is a wonderful photo-essay of terraced pools around the world. I had no idea there were so many in such a variety of places. Above are the pools at Havasu Falls on the Havasupai reservation reached from the Grand Canyon in Arizona. There are regular pack trips down and back, or you can hike.

The other American terraced pools are at Mammoth Hot Springs in Yellowstone National Park. Some of the world’s pools are quite amazing and look somewhat unearthly.